US3740166A - Slurry pump of oil-diaphragm type - Google Patents

Slurry pump of oil-diaphragm type Download PDF

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Publication number
US3740166A
US3740166A US00134946A US3740166DA US3740166A US 3740166 A US3740166 A US 3740166A US 00134946 A US00134946 A US 00134946A US 3740166D A US3740166D A US 3740166DA US 3740166 A US3740166 A US 3740166A
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US
United States
Prior art keywords
slurry
oil
pump
diaphragm
pipe part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00134946A
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English (en)
Inventor
K Seki
T Kazama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Shindoh Co Ltd
Original Assignee
Mitsubishi Shindoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Mitsubishi Shindoh Co Ltd filed Critical Mitsubishi Shindoh Co Ltd
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Publication of US3740166A publication Critical patent/US3740166A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/141—Intermediate liquid piston between the driving piston and the pumped liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • This invention relates generally to slurry pumps of the oil-diaphragm type and more particularly to a slurry pump of this type with a new and advance communication path between the valve box and the oil-diaphragm chamber of the pump.
  • Slurry pumps with which this invention is concerned are of the class described in Japanese Patent Publication No. 12131/1960, U.S. Pat. No. 3,241,496, patented Mar. 22, 1966, British Pat. No. 1,187,912, patented Aug. 12, 1970, and South African Pat. No. 68/0753, patented May 30, 1969.
  • liquids pumped by slurry pumps contain, in addition to solid particles, air bubbles in the form of minute particles, which give rise to various severely deleterious effects on the pump performance.
  • the oildiaphragm chamber contains slurry with a large quantity of solid particles and a diaphragm oil, and the slurry connecting pipe between the valve box and the diaphragm chamber is also filled with the slurry.
  • the liquid resistance is higher than that in other piston pumps and becomes a cause of liquid column separation which gives rise to loud noise and vibration in the mechanical structure of the pump. Furthermore, when air accumulates within the oildiaphragm chamber, it causes a drop in the delivery capacity, of the pump and impairment of pumping perfor- 'mance in continuous operation over a long period.
  • an oil-diaphragm slurry pump in which, in a riser portion of the slurry connecting pipe, there is provided a pipe part of large crosssectional area having an internal volume greater than the suction displacement of the plunger pump of the slurry pump and having an internal configuration such that the cross-sectional area of the slurry flowpath therewithin is abruptly changed thereby to generate turbulent flow, eddy flow or vortices continually in the slurry flow during operation of the slurry pump.
  • FIG. 1 is a diagrammatic side elevation, in vertical section, showing the essential parts of an example of an oil-diaphragm slurry pump constituting an embodiment of the invention.
  • FIG. Z is a fragmentary, diagrammatic side elevation, in vertical section, showing the essential parts of another embodirnent of the invention. 1
  • the principal components of the oil-diaphragm slurry pump illustrated therein are a plunger pump 1, a valve box 7, and an oil-diaphragm chamber 5 connected therebetween.
  • the plunger pump 1 has a cylinder 3 and a plunger 2 operating as a reciprocating piston in the cylinder 3 to draw in and expel diaphragm oil.
  • the cylinder 3 is communicatively connected by an oil connecting pipe 4 to the upper part of the oil-diaphragm chamber 5, the lower part of which is communicatively connected by a slurry connecting pipe 6 to a middle chamber 7a in the valve box 7.
  • the diaphragm chamber 5 contains in its upper part a diaphragm oil 18, which is integrally communicative with oil in the oil connecting pipe 4 and the cylinder 3, and in its lower part with slurry 17, which is integral with slurry in the slurry connecting pipe 6 and the middle chamber 7a.
  • An interface 19 is naturally formed between the oil 18 and slurry 17 in the oil-diaphragm chamber 5.
  • the chamber 5 is provided thereabove with an oil reservoir tank 15 connected by way of a shut-off valve 16 to the top of the chamber 5.
  • the valve box 7 has at its bottom a slurry suction pipe 2 and at its top a slurry discharge or delivery pipe 13.
  • the aforementioned middle chamber 7a is formed between ball valves 10 and 11 operating cooperatively with respective valve seats 8 and 9' formed on the inner wall surface of the valve box 7.
  • the ball valves 10 and 11 and their valve seats operate as: check valves to permit slurry to flow in only the delivery direction.
  • the riser part of the slurry connecting pipe 6 is provided with a largediameter conduit or pipe part 14 in which the flowpath cross-section area of the pipe 6 increase abuptly, and which has a volumetric capacity greater than the suction displacement volume of the plunger pump 1.
  • the slurry in the connecting pipe undergoes reciprocating flow alternately toward and away from the valve box 7.
  • the slurry flows in this manner through the abruptly expanded, large-diameter conduit 14, vortices or eddys are formed in the slurry or turbulent flow of the slurry is created, whereby the particles contained in the slurry are continually maintained in a flloating state without settling even when at low flow velocities. Accordingly, clogging of the pipe 6 due to settling and accumulation of the particles does not occur.
  • this large-diameter conduit part 14 is greater than the suction displacement of the plunger pump 1, there is no possibility of air or bubbles tending to be entrained in the slurry being drawn into the diaphragm chamber 5 through the connecting pipe 6 and thereby of a lowering in the pump delivery.
  • the slurry connecting pipe 6 is providedin its I riser portion with a large-diameter pipe part 20, which I has therewithin a plurality of baffle plates 21 of shapes similar to orifice plates.
  • baffle plates 21 function to produce abrupt changes in the flow cross-sectional area and, accordingly, to form vortices eddys or turbuwhich the aforedescribed difficulties are overcome.
  • the labour of deaeration is unnecessary since the infiltration of air into and accumulation thereof in the oil-diaphragm chamber is prevented, and the pump delivery can be maintained steadily for long periods.
  • the flow resistance in the slurry connecting pipe is decreased, there is no liquid column separation, whereby generation of noise and vibration is prevented.
  • an oil-diaphragm slurry pump comprising a plunger pump of a certain suction displacement, a valve box for pumping slurry, and an oil-diaphragm chamber communicating by way of an oil path with the plunger pump and communicating with the valve box by way of a slurry connecting pipe having a riser portion
  • said riser portion has a pipe part of enlarged cross-sectional area, said pipe part having an internal volume greater than the volume by which the plunger pump makes said suction displacement and also having such an internal configuration that the cross-sectional area of the slurry flowpath through the pipe part is abruptly and discontinuously changed at least at both ends of the pipe part, said pipe part having therewithin baffle plates for generating vortices in the slurry flow in the pipe part during operation of the slurry pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US00134946A 1971-01-28 1971-04-19 Slurry pump of oil-diaphragm type Expired - Lifetime US3740166A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46002600A JPS5017683B1 (xx) 1971-01-28 1971-01-28

Publications (1)

Publication Number Publication Date
US3740166A true US3740166A (en) 1973-06-19

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ID=11533862

Family Applications (1)

Application Number Title Priority Date Filing Date
US00134946A Expired - Lifetime US3740166A (en) 1971-01-28 1971-04-19 Slurry pump of oil-diaphragm type

Country Status (6)

Country Link
US (1) US3740166A (xx)
JP (1) JPS5017683B1 (xx)
CA (1) CA941235A (xx)
DE (1) DE2127817A1 (xx)
GB (1) GB1315094A (xx)
ZA (1) ZA712461B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891352A (en) * 1972-11-02 1975-06-24 Mitsubishi Metal Corp Liquid-piston type slurry pumping system
US4378183A (en) * 1980-09-18 1983-03-29 The Pittsburgh & Midway Coal Mining Co. Apparatus and method for pumping hot, erosive slurry of coal solids in coal derived, water immiscible liquid
US4961688A (en) * 1988-01-21 1990-10-09 Compagnie Europeene Du Zirconium Cezus Process and apparatus for pumping and metering a liquid product with a melting point between 200 and 350 degrees C.
US5310321A (en) * 1990-07-24 1994-05-10 Baker Hughes Incorporated Pump system
US6244833B1 (en) * 1999-08-04 2001-06-12 David Allyn Hettinger Device to increase slurry density
US20160327032A1 (en) * 2013-12-18 2016-11-10 Mhwirth Gmbh Hot slurry pump
CN111219885A (zh) * 2020-01-19 2020-06-02 侯中泽 一种流体活塞热源泵

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193368B (de) * 1960-10-07 1965-05-20 Babcock & Wilcox Dampfkessel Kolbenpumpe fuer chemisch aggressive Fluessigkeiten
US3241496A (en) * 1964-02-29 1966-03-22 Tamagawa Kikai Kinzoku Kk Apparatus for pumping slurry and like fluids

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193368B (de) * 1960-10-07 1965-05-20 Babcock & Wilcox Dampfkessel Kolbenpumpe fuer chemisch aggressive Fluessigkeiten
US3241496A (en) * 1964-02-29 1966-03-22 Tamagawa Kikai Kinzoku Kk Apparatus for pumping slurry and like fluids

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891352A (en) * 1972-11-02 1975-06-24 Mitsubishi Metal Corp Liquid-piston type slurry pumping system
US4378183A (en) * 1980-09-18 1983-03-29 The Pittsburgh & Midway Coal Mining Co. Apparatus and method for pumping hot, erosive slurry of coal solids in coal derived, water immiscible liquid
US4961688A (en) * 1988-01-21 1990-10-09 Compagnie Europeene Du Zirconium Cezus Process and apparatus for pumping and metering a liquid product with a melting point between 200 and 350 degrees C.
US5310321A (en) * 1990-07-24 1994-05-10 Baker Hughes Incorporated Pump system
US6244833B1 (en) * 1999-08-04 2001-06-12 David Allyn Hettinger Device to increase slurry density
US20160327032A1 (en) * 2013-12-18 2016-11-10 Mhwirth Gmbh Hot slurry pump
CN111219885A (zh) * 2020-01-19 2020-06-02 侯中泽 一种流体活塞热源泵

Also Published As

Publication number Publication date
CA941235A (en) 1974-02-05
ZA712461B (en) 1972-01-26
JPS5017683B1 (xx) 1975-06-23
DE2127817A1 (de) 1972-08-17
GB1315094A (en) 1973-04-26

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